High security door lock

Claim 2

A high security door lock comprising: crossbar means adapted for mounting on a door; keeper means adapted for mounting on a door frame; pin means for mechanically coupling said crossbar means to said keeper means; said pin means including projection means integrally formed therewith; said keeper means including at least one slot for receiving said pin means and said projection means; locking channel means integrally formed with said keeper means and oriented at an angle to said slot for receiving said projection means upon insertion of said projection means through said slot and rotation of said pin means; and biasing means coacting with said pin means for holding said projection means in said locking channel means and preventing coupling of said crossbar means for said crossbar means from said keeper means absent depression and rotation of said pin means.

Claim 3

A high security door lock as in claim 1 wherein said keeper means has upper and lower spaced members, each of said members having a slot for receiving said pin means.

Claim 4

A high security door lock as in claim 2 wherein said locking channel means is located on said lower member of said keeper means.

Claim 5

A high security door lock as in claim 2 wherein the crossbar has an outward projection thereon which coacts with said upper and lower spaced members and said pin means extending therebetween to inhibit jimmying.

Claim 6

A high security door lock as in claim 1 wherein the locking channel means includes a pair of spaced depending lugs.

Claim 7

A high security door lock as in claim 1 wherein the crossbar has a notch for receipt of said pin means.

Claim 8

A high security door lock as in claim 1 wherein said biasing means is located remote from said pin projection means.

Claim 9

A high security door lock as in claim 1 wherein the biasing means is a spring concentric with said pin means.

Claim 10

A high security door lock as in claim 1 including a safety chain, a slot in said keeper means and a slot in said crossbar for removably receiving said safety chain therein to allow partial opening of the door when said pin means is absent from said slot.

Claim 11

A high security door lock as in claim 1 wherein the crossbar includes saw resistant means along its length.

Claim 12

An improved door lock having a crossbar, a keeper having spaced members for receiving the crossbar therebetween and a pin, the spaced members having apertures for receiving said pin; the improvement comprising: projection means integrally formed with said pin; slots adjoining said apertures for enabling said projection means to pass therethrough upon receiving said pin; said pin mechanically coupling the crossbar to the keeper; locking channel means integral with one of said spaced members and at an angle to said slot in said spaced member, said locking channel means adapted to receive said projection means; biasing means for holding said projection means in said locking channel to prevent uncoupling of the crossbar from the keeper absent depression and rotation of the pin.

Claim 13

An improved door lock having a crossbar, a keeper having spaced members for receiving the crossbar therebetween and a pin, the spaced members having apertures for receiving said pin; the improvement comprising: projection means integrally formed with said pin; slots adjoining said apertures for enabling said projection means to pass therethrough upon receiving said pin; said pin mechanically coupling the crossbar to the keeper; locking channel means integral with one of said spaced members and at an angle to said slot in said spaced member, said locking channel means adapted to receive said projection means; biasing means for holding said projection means in said locking channel to prevent uncoupling of the crossbar from the keeper absent depression and rotation of the pin.

Claim 14

A high security door lock comprising: a crossbar means for mounting on a door; a yoke shaped keeper means for mounting on a door frame; said yoke shaped keeper means having upper and lower spaced members for receipt of said crossbar therebetween; said uper and lower spaced members including apertures with slots in communication with said apertures; a pin means for receipt in aid apertures to mechanically secure said crossbar means to said keeper means, said pin means including projection means for passage through said slots; locking channel means integrally formed with one of said spaced members of said keeper means and oriented at an angle to said slot in said one spaced member for receiving said projection means upon rotation of said pin means after said projection means has passed through said aperture of said one spaced member; an outward projection means integral with said crossbar means and located at the end remote from the door which in cooperation with the upper and lower members of the keeper means and said pin inhibits jimmying of the door; and biasing means coacting with said pin means for holding said projection means in said locking channel means to prevent withdrawal therefrom absent depression and rotation of said pin means.

Claim 15

A high security door lock comprising: a crossbar means for mounting on a door; a yoke shaped keeper means for mounting on a door frame; said yoke shaped keeper means having upper and lower spaced members for receipt of said crossbar therebetween; said uper and lower spaced members including apertures with slots in communication with said apertures; a pin means for receipt in aid apertures to mechanically secure said crossbar means to said keeper means, said pin means including projection means for passage through said slots; locking channel means integrally formed with one of said spaced members of said keeper means and oriented at an angle to said slot in said one spaced member for receiving said projection means upon rotation of said pin means after said projection means has passed through said aperture of said one spaced member; an outward projection means integral with said crossbar means and located at the end remote from the door which in cooperation with the upper and lower members of the keeper means and said pin inhibits jimmying of the door; and biasing means coacting with said pin means for holding said projection means in said locking channel means to prevent withdrawal therefrom absent depression and rotation of said pin means.

Claim 16

A high security door lock as in claim 12 wherein said projection means is adjacent the lower end of said pin, and the locking channel means is located on said lower member of said keeper means.

Claim 17

A high security door lock as in claim 13 wherein the biasing means is concentric with the pin and remote from the pin projection means.

Claim 18

A high security door lock as in claim 14 wherein the biasing means is a spring for applying upward force on said pin means to hold said projection means in said locking channel means.

Claim 19

A high security door lock as in claim 15 wherein said pin means includes a groove for receiving one end of said spring.

Claim 20

a high security door lock as in claim 12 wherein the locking channel means is a pair of spaced depending lugs for receipt of said projection means.

Claim 21

A high security door lock as in claim 12 including a safety chain; a slot in said crossbar means and a slot in said keeper means for removably receiving said safety chain for preventing full opening of the door when the pin is absent from said aperture.

Claim 22

A high security door lock as in claim 12 wherein the crossbar contains a hardened steel pin extending throughout its length.